1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6cebf6adcacacd96494ca71f161236e00aa6c6491156f678889ca83689d786. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ca50b02-6c7e-48ba-9c91-0a26b07364d6.json and https://artists.proofprofile.net/proofs/artist/1ca50b02-6c7e-48ba-9c91-0a26b07364d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca117a741620d073b8bd738c4767e9a34a533153ca1382cde1533d2dc57e97e2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52045560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56474cd65373fdc20d932836181de3872dcec661587baa8c04ad16f3f9e32a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52045561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89f7cabcc2e65226d98302a89895f83b26b99d92b6dd6f0a0f4ab6cf4f61cf8. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52045563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325de30837524ece5e8ac71959a40f48fea4c6b6ad1b4e6424a6a416ea3d167b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52045565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1888a7cc54830591ce8ea0a4c0ed0df535f49187441ae0336bcad1f52bf6119. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52045567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60464150952e198f1b3f98761aaa53fe944801ef8eafdc3549b0809f079bd0eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52045571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d5d42dfbdffcc7e5961c007daf7efa3e1312b38a419ee1ccab60688b36baf7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62046625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c4085abf5774c387b9943633d353ba7b723f52ecd8a27ba96a14c7cb235092. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2065671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59120b2b07c0b9a290dd31aa52d0e8493ee3ba4570636c8a9ec659075314378a. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2065677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7742b306582ea93a4e9d6b653a3cc7e264e2595a470dc2dd36f6716a150c16e2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2065678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0107cf212b6a3f87f0df7992927fd4ffc9a77bedfe6ace86ad61a203657018. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2131995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb07102b72d486bbe99b539093eb87b4b4eb7f508cdb1d2376e6e5dae662386. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2131999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f01275bc005ec2782e60d0a54491a7cd4404698773e4f836832db734a67c651. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:15:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2132002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f33e9e5ccc19c1e95ae06c7ec59dd2477ba5fc4fa1bbe93c876ab214dcd6b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2132004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656a4581060b55dc751cd23a226aeea59bb8076812be173fa807388885f4420c. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2124905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3345f2391327e8d105ee13d42cab717c0890829e7f36da561a2052234c97f60d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b01ea550208d971ec46adb3bdd3e01ad05e69154df630b7061220c4ef34059. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19877297745d934447e89e875fa493c9f587b930524faa98754c1c2338d4e34. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64921b182e49a3b139a2fb5ec219fe6cb3d92d64c822e34c854d4c90b12e67a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4914eca78769cdf0e31bfb1d2f8f4d62fca41a9663f666852a403f55a0605812. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2328779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fac32e707620a5e2793cec6714d6e2e8754aeca477fd4c0635ba0bec0f918a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7S2590094.